Amplifying-horn.



, c. BBcRof-ET.

AMPLIPYING' HORN.

APPLICATION FILED MAY-29, 1905.

. Patented' Mar; 9; 1909.-

y wnNEssEs UNITED sTATEs PATENT OFFICE.

i CLEMENTBEECROFT, vor PHILADELPHIA, rENNsYLvANIYA.

'AMPLIFYING-HORN.

Specification of Letters Patent.

Patented Maren 9,1909.

Application led May 29, 1905. Serial No. 262,714.

To all whom it may concern.' i

Be it known that I, CLEMENT BEEoRor'r, a

' citizen oi' the United States, residing at Philadelphia, in the county of Philadelphia and-'State of Pennsylvania, have -invented certain new and useful Improvements in -Amplil'ying-Horns; and l do hereby declare ,the following to be afull, clear, and exact dea series of sections of metal are-united by suitable joints common in metal joining and l given the form of a flower, more particularly Y horns are, further, formed of a series of lon-v the -llovver kno'wnas the morning glory, v the sides of the horn flaring outwardly towardits large end upon curved lines. These gitudinal strips, each oil-.which has its opposite edges diverging upon curved lines7 and is before vassembling bent into a curved shape, such curvature increasing toward the Wide end of the strip.

The objects of the invention are to cause tl individual strips to properly retain their curvature as formed or stamped until they are finally joined together in the-complete horn; to prevent their distortion before, lor while being assembled; to thus facilitate the operation oll assembling the strips into a complete form and save time and-labor; to obtain a more finished product or erfect horn to enable by these means, lig t thin sheet metal to be employed Without in any way detracting from the appearance or utility oi the horn; to lessen the cost of such amplifying horns, and to obtain other advantages andresults as may be brought outin the 'following description.

The invention consists in the improved amplifying horn, and in the varrangements and combinations of parts oi the same, all substantially as will be -hereinafter set forth and finally embraced in the clauses of the claim. y

`Referring to the accompanying drawings, in which like characters of rei'erence indicate corresponding parts in each of theseveral' tions thereof before insertion, and Fig. 3 isa transverse section of the same taken at line Y It Will be understood that in horns of the construction herein set forth the longitudinal strips are made of sheet metal as thin and light as possible, so that the horns will be neither heavy to handle, nor too expensive. Each of the strips 5, referring to the drawings, is first stamped out in a Hat blank, and is then pressed or longitudinally bent into its vcurved form as shown, and the1 edges 6, formed lpreparatory to assembling the requisite number of strips into a complete'horn. Heretofore it has been diflicult in such manufacture to have the individual strips properly retain their curvature as so formed Vor pressed, until they were inally joined together in -the complete horn; said strips, being light, narrow vand flexible, were liable to become' Warped or distorted, so that the assembling of them into a horn involved more labor 'or theuniiormity of the horn was impaired, and to overcome thisdifliculty is the chier` purposeof my invention. To this end, in forming or pressing each strip 5, into its curved shape, ridges lor ribs 8, are created therein, which areV so located as to retain the light sheet metal in its curved form by reason or' the increased stillness thereby imparted. These ribs are placed Where they are most needed, to wit, at or near the broad end 7, ofg

the strip, where its increased'ciirvature is located, as shown in the drawings?. The ribs 81nayfbe of any coniignration o'dimensions desired, although one of the simplest and' most efficacious forms is that shown in the draWing,vi'/.., three ribs disposed longitudinally of the strip or section and'e'xtending across the point oi sharpest curvature of the strip. These ridges or ribs thus set, as it Were, the strip or section in its newly pressed form, and assist it in retaining the same until assembled. Moreover, the said ribs are in no Way objectionable in the completed horn, since they not only give greater strength and rigidity to the broad ends of the longitudinal sections, which are more likely than any other part to become bent or bruised when the horn is set upon the floor, but 'furthermore the ribs are ay considerable'feature of ornamentation to the horn. Obviously, said ridges or ribs 8, ma project on either side of the strips 5, as desired, but I prefer to force them outwardly With respect to the chamber ,V

xtill foin-tlieedges of the strip and terminating .Preferably each and every one of the longishnfd be desired *forv ornamentation or vthe like', some ofthe stri s, as for instance the alternatel ones, could lie'left plain, and-those at the sides' of the.'V lain ones depended upon im; :.bi'ngingjthe p ain strips to'the proper curvature' while forming. a com lete horn. Irprefenhowever, to form the ri s orridges upon every individual strip of the horn, since this procures the best results.

NAHaving thus described the invention,'what I claim as newiszy 1 "An amplifying horn having abody portion flaring on curved lines and composed of a series fof longitudinal strips Whose correspondingly 'curved edges are secured together, 'ne'o'isaid stripshaving a narrow longitudinal'portion'oiitsel'f displaced outwardly from tha-body 'portion ofthe strip and forming pinne outside of the horn an integral rib and Q fenside a groove, said displaced long# inalfportion being located at a distance.

at its ends at a distance from the ends of the strip.

2. An amplifying horn having `a body perf edges by which they arel j oine'd together, one

of narrow ongitudmal portions of itself dis placed outwardly from the body portion of the strip and forming on the outside of the. horn'integral ribs and on the inside groav'es7 CLEMENT BEEcRoFT.

Witnesses:

CHARLES H. PELL,.

R UssELL M. EVERETT.

saidseries of displaced; longitudinal portlons tion Haring on curved lines which increase in. curvature near the large endof said Haringbody portion and being composed of longitudi-l nall strips having outwardly diverging curved of said stri sj having at its broad end'a series 

